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The Effects of Screw Removal on Bone Strain in an Idealized Plated Bone Model
Author(s) -
KORVICK D. L.,
MONVILLE J. D.,
PIJANOWSKI G. J.,
PHILLIPS J. W.
Publication year - 1988
Publication title -
veterinary surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 79
eISSN - 1532-950X
pISSN - 0161-3499
DOI - 10.1111/j.1532-950x.1988.tb00288.x
Subject(s) - medicine , strain (injury) , orthodontics , osteoporosis , dentistry , stress (linguistics) , anatomy , philosophy , linguistics , endocrinology
An idealized plated bone model was used to test the hypothesis that selected screw removal could alter the bone strain field and be a viable treatment for stress protection osteoporosis. Eighteen bone screw modifications were evaluated for their effects on bone strain. The three variables studied were number, position, and length of screws. Removal of two or four bone screws from an eight hole plate significantly increased the strain per load on the bone model over the values with eight screws in the plate (p < 0.05). The four screw configurations increased bone strain more than the six screw configurations. It also was shown that the position of screws in the plate could significantly alter the bone strain per load results. Removal of six bone screws from an eight hole plate also increased the bone strain per load, but to excess in some tests. In those configurations, the results were not statistically different from the un‐plated configuration. Replacement of the full length screws with eight half length screws that engaged only the near cortex significantly reduced bone strain per load as compared with eight bicortical bone screws.